Liquid fuel burner



March 14, 1944, E. s. RowLANDsQN l 2,344,218

LIQUID FUEL BURNER Filed Oct. 8, 1941 Imm] w jmmr/Mmmm# Patented Mar. 14, 1944 UNITED STATES PATENT OFFICE Application October 8, 1941, Serial No. 414,191 In Great Britain October 31, 1940 1 Claim.

The present invention relates to an improved liquid fuel burner.

An object of the present invention is to provide a burner which will not readily become clogged in use when burning liquid fuel which may not have been puried or refined, the burner being capable of burning waste lubricating oil after this, for instance, has completed its useful life in the crank case of an internal combustion engine, crude oil, parain, or indeed any other liquid oil.

According to the present invention oil is fed at a measured rate by a pump, or preferably by gravity, to a tray forming the base of an enclosed chamber having slotted walls, the slots of which do not extend fully down the sides of the said enclosed chamber to allow of a pool of liquid fuel being collected at the base of this chamber. This closed burner chamber is mounted in spaced relationship to a perforated casing provided with one or more air inlets which can be individually controllecl.

The invention is more particularly described with reference to the accompanying drawing, in which:

Figure l is an elevation, partly in section, of one form of construction,

Figure 2 is a corresponding sectional plan view.

Liquid fuel, which may conveniently be waste lubricating oil, is fed to a pipe I at a measured rate, either, for instance, by a pump, but preferably by gravity, from a tank 2 through a tap 3, which may be directly connected in the pipe line I, or which may allow the waste oil fuel to drip into a funnel 4 on the pipe I. The pipe I passes through the wall of a casing 5 of a heating chamber which may serve to heat a room by radiation or by inducing convection currents.

The pipe I also passes through the wall of a flue pipe 'l which, within the chamber 5, is perforated as at 8 and extends above a plate 9 forming a surfaceupon which the oil is ignited. It will usually be desirable to arrange a number of such plates 9, I5, one above the other, which plates may be corrugated or dished to give an increased surface area, and if desired, the lower plate such as I may be of slightly larger diameter than an upper plate such as 9.

Primary air for combustion passes through a pair of inlets I I in the base of the chamber 5, and then around the lowermost tray I2 of the sequence 9, Il) I 2, whilst secondary air passes in through the perforations 8 of the flue l.

It will be preferable to enshroud the plates 9, Ill, with an open cylindrical casing I3 having a serrated edge and perforated at its sides for the inlet of air.

The inner casing shown as the lower end of the ue pipe 'I is provided with a hinged door I4 for access to the burner for ignition purposes after the outer door I5 on the casing 6 is opened.

One or more of said closed chambers may be disposed either in the same plane or in separate planes within a common casing, and where a number of chambers are so disposed, they may be arranged one above the other, a pipe leading from the base of one into the next below, so that excess of liquid fuel in any one chamber may gravitate to the chamber next below it, the upper chambers being heated by the flames from the lower chambers.

In starting the burner initially where it is desired to burn fuel of low volatility, a small quantity of a highly volatile spirit, such as methylated spirits, may be passed to the burner chamber and ignited, whereupon the ow of heavier fuel can be commenced.

I declare that what I claim is:

A burner for liquid fuel comprising in combination an enclosing casing, a ilue pipe extending down into said casing and having perforations within the enclosed part, an imperforate tray disposed within the lower end of said flue pipe, a number of plates mounted in parallel disposition one above the other and above said tray, a base closing said casing and having air openings disposed within the area of the end of the flue pipe, a cylindrical casing carried by said trayY and enclosing said plates, said casing being perforated and having a serrated lower edge whereby air can pass radially inwards under and above each tray, and controlled means for supplying a liquid fuel to the uppermost plate.

ERIC SHELDON ROWLANDSON. 

